async-once

2.0.0 • Public • Published

async-once

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Guarantee a node-style async function is only executed once.

Usage

var once = require('async-once');

var count = 0;

var myAsyncFunc = once(function (cb) {
  count++;
  cb(null, count);
});

myAsyncFunc(function (err, result) {
  assert(result === 1);
});

myAsyncFunc(function (err, result) {
  assert(result === 1);
});

assert(count === 1);

API

once(fn)

Takes a node-style async function (fn) to ensure it's only called once. The function should accept a callback as its last parameter which is called with cb(err, result). Returns a function that can be called any number of times but will only execute once. Arguments passed to the returned function will be passed to the fn.

License

MIT

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Install

npm i async-once

Weekly Downloads

65

Version

2.0.0

License

MIT

Unpacked Size

4.89 kB

Total Files

4

Last publish

Collaborators

  • yocontra
  • phated